[david8613]

is it ok for a 6ft tall person to use 170mm cranks, or will it not feel right? im cureently using 175mm and they feel great, by the way its a 29er, with an 11/34 cassette and the bike is a large...

 

[FBinNY]

Other than being different than what you're used to, they'll be fine. It's a diference of less than 1/4 inch, or about 3%, so not exactly a life changing difference.

BTW, why are you switching?

 

[AlexJK]

Whatever feels comfortable! you may even benefeit from 180s!

i'm 6' tall and 175 is perfect for me. (Thats me though!)

 

[jeffscott]

is it ok for a 6ft tall person to use 170mm cranks, or will it not feel right? im cureently using 175mm and they feel great, by the way its a 29er, with an 11/34 cassette and the bike is a large...

I certainly noticed the difference going from 170 to 175....

My knees hurt for the first week...

Then it felt like I could finally take a full step

BTW the extra torque is worth about 1 sprocket tooth on the 34 ring.

 

[Glynis27]

I am also 6' tall. I have one bike with 170, one with 172.5 and one with 175. I can notice a slight difference, but it doesn't bother me. I think my next bike will be 170 for the extra clearance.